[londons_explore]

Model architecture and weights are open source.

Training data is not (but I don't think anyone in this game has fully open training data)

[marci]

Here you'll find some of the most advanced, fully open (models, data, code, logs, checkpoints...): https://allenai.org/blog/olmo2

[tokioyoyo]

Nobody wants to be sued to oblivion.

[hustwindmaple1]

There are a couple, i.e., OLMo 2